As part of advertising campaign, the Dairy Council is interested in determining the daily intake of milk among adults. A random sample of ten adults gave the following results. (Values are given in ounces.)
|
23
|
30.6
|
20.3
|
10.1
|
11.5
|
|
21.8
|
22.2
|
26.9
|
21
|
30.1
|
a. Find out 'x and s for this data set.
b. Make a 99 percent confidence interval for mean daily intake of milk. You might suppose the daily intake amounts are normally distributed. (Note: These results could then be employed in later studies to see if the ad campaign is succeeding in increasing amount of milk adults drink.)